﻿#include <iostream>
#include <vector>
using namespace std;


class Solution
{
public:
    // 97. 交错字符串
    bool isInterleave(string s1, string s2, string s3)
    {
        int m = s1.size(), n = s2.size();
        if (m + n != s3.size())
            return false;
        s1 = " " + s1, s2 = " " + s2, s3 = " " + s3;

        vector<vector<bool>> dp(m + 1, vector<bool>(n + 1));
        dp[0][0] = true;
        for (int i = 1; i <= m; i++)
            if (s1[i] == s3[i])
                dp[i][0] = true;
            else
                break;
        for (int i = 1; i <= n; i++)
            if (s2[i] == s3[i])
                dp[0][i] = true;
            else
                break;

        for (int i = 1; i <= m; i++)
            for (int j = 1; j <= n; j++)
                dp[i][j] = (s1[i] == s3[i + j] && dp[i - 1][j]) ||
                (s2[j] == s3[i + j] && dp[i][j - 1]);

        return dp[m][n];
    }
};

int main()
{

    return 0;
}